When I read the headline I thought I was going to see a QR code printed in UV-se...

		artursapek on May 25, 2012 \| parent \| context \| favorite \| on: Retailer uses 3D QR codes and the Sun to time limi... When I read the headline I thought I was going to see a QR code printed in UV-sensitive ink. This is much more creative. Like people have said though, this probably isn't as maintainable as a UV-sensitive one might have been.